Alex Volskiy created HDFS-13322:
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Summary: fuse dfs - uid persists when switching between ticket
caches
Key: HDFS-13322
URL: https://issues.apache.org/jira/browse/HDFS-13322
Project: Hadoop HDFS
Issue Type: Bug
Components: fuse-dfs
Affects Versions: 2.6.0
Environment: Linux xxxxxx.xx.xx.xxx 3.10.0-514.el7.x86_64 #1 SMP Wed
Oct 19 11:24:13 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux
Reporter: Alex Volskiy
The symptoms of this issue are the same as described in HDFS-3608 except the
workaround that was applied (detect changes in UID ticket cache) doesn't
resolve the issue when multiple ticket caches are in use by the same user.
Our use case requires that a job scheduler running as a specific uid obtain
separate kerberos sessions per job and that each of these sessions use a
separate cache. When switching sessions this way, no change is made to the
original ticket cache so the cached filesystem instance doesn't get regenerated.
{{$ export KRB5CCNAME=/tmp/krb5cc_session1}}
{{$ kinit user_a@domain}}
{{$ touch /fuse_mount/tmp/testfile1}}
{{$ ls -l /fuse_mount/tmp/testfile1}}
{{ *-rwxrwxr-x 1 user_a user_a 0 Mar 21 13:37 /fuse_mount/tmp/testfile1*}}
{{$ export KRB5CCNAME=/tmp/krb5cc_session2}}
{{$ kinit user_b@domain}}
{{$ touch /fuse_mount/tmp/testfile2}}
{{$ ls -l /fuse_mount/tmp/testfile2}}
{{ *-rwxrwxr-x 1 user_a user_a 0 Mar 21 13:37 /fuse_mount/tmp/testfile2*}}
{{ }}{color:#d04437}*{{** expected owner to be user_b **}}*{color}
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